Home / 21,720.48-29,974.56-13,332

Finding the Fourth Proportional to 21,720.48, 29,974.56 and 13,332

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Solution

The fourth proportional to 21,720.48, 29,974.56 and 13,332 is: 18,398.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,720.48 : 29,974.56 = 13,332 : x
  2. Step 2: Convert to fraction form
    21,720.48/29,974.56 = 13,332/x
  3. Step 3: Cross multiply
    21,720.48x = 29,974.56 × 13,332
  4. Step 4: Simplify right side
    21,720.48x = 399,620,833.92
  5. Step 5: Solve for x
    x = 399,620,833.92/21,720.48
  6. Step 6: Final answer
    x = 18,398.34

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.